Correct. I used to have a 30-06 field gun with a muzzle brake. Unbelievable how loud it was. I'd have guys from other shooting lanes come over just to make sure I wasn't shooting a 50 BMG, or some such.
Have to laugh at guys with .223/5.56mm agonizing over what bake to use.....
Probably change my mind with a .338 Lapua though.......